Its not obvious.
Press and hold the MODE button until TA VOLUME is displayed
Repeatedly press MODE button until CLOCK SET is displayed
Seek up/ seek down keys select 12 or 24 hr mode
Press MODE Button
If 12 hr mode is selected use # button to selected Am or PM
Use keypad to enter time .... four digits
Press and hold MODE key to exit
Its in the Drivers Handbook Supplement
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